package ar.com.miguelgriffa.eclipse.wizards.secureproperties;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.lang.reflect.InvocationTargetException;
import java.util.Properties;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IWorkspaceRoot;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.wizard.Wizard;
import org.eclipse.ui.INewWizard;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWizard;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.ide.IDE;

import ar.com.miguelgriffa.secureproperties.SecureProperties;

/**
 * This is a sample new wizard. Its role is to create a new file 
 * resource in the provided container. If the container resource
 * (a folder or a project) is selected in the workspace 
 * when the wizard is opened, it will accept it as the target
 * container. The wizard creates one file with the extension
 * "properties". If a sample multi-page editor (also available
 * as a template) is registered for the same extension, it will
 * be able to open it.
 */

public class SecurePropertiesWizard extends Wizard implements INewWizard {
	private SecurePropertiesWizardPage page;
	private ISelection selection;

	/**
	 * Constructor for SecurePropertiesWizard.
	 */
	public SecurePropertiesWizard() {
		super();
		setNeedsProgressMonitor(true);
	}
	
	/**
	 * Adding the page to the wizard.
	 */

	public void addPages() {
		page = new SecurePropertiesWizardPage(selection);
		addPage(page);
	}

	/**
	 * This method is called when 'Finish' button is pressed in
	 * the wizard. We will create an operation and run it
	 * using wizard as execution context.
	 */
	public boolean performFinish() {
		final String plainFileName = page.getPlainFileName();
		final String secureFileName = page.getSecureFileName();
		IRunnableWithProgress op = new IRunnableWithProgress() {
			public void run(IProgressMonitor monitor) throws InvocationTargetException {
				try {
					doFinish(plainFileName, secureFileName, monitor);
				} catch (CoreException e) {
					throw new InvocationTargetException(e);
				} finally {
					monitor.done();
				}
			}
		};
		try {
			getContainer().run(true, false, op);
		} catch (InterruptedException e) {
			return false;
		} catch (InvocationTargetException e) {
			Throwable realException = e.getTargetException();
			MessageDialog.openError(getShell(), "Error", realException.getMessage());
			return false;
		}
		return true;
	}
	
	/**
	 * The worker method. It will find the container, create the
	 * file if missing or just replace its contents, and open
	 * the editor on the newly created file.
	 */

	private void doFinish(
			String srcFileName,
			String tgtFileName,
			IProgressMonitor monitor)
	throws CoreException {
		// FIXME write secure properties
		// create a sample file
		monitor.beginTask("Creating " + tgtFileName, 2);

		IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
		final IFile file = root.getFile(new Path(tgtFileName));
		try {
			Properties p = new Properties();
			p.load(root.getFile(new Path(srcFileName)).getContents());

			SecureProperties sp = new SecureProperties();
			sp.putAll(p);
			ByteArrayOutputStream out = new ByteArrayOutputStream();
			sp.store(out, "Generated by eclipse plugin");


			InputStream stream = new ByteArrayInputStream(out.toByteArray());
			if (file.exists()) {
				file.setContents(stream, true, true, monitor);
			} else {
				file.create(stream, true, monitor);
			}
			stream.close();
			monitor.worked(1);
			monitor.setTaskName("Opening file for editing...");
			getShell().getDisplay().asyncExec(new Runnable() {
				public void run() {
					IWorkbenchPage page =
						PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();

					try {
						IDE.openEditor(page, file, true);
					} catch (PartInitException e) {
					}
				}
			});
		} catch (Exception e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		}
		monitor.worked(1);
	}
	
	/**
	 * We will initialize file contents with a sample text.
	 */

	private InputStream openContentStream() {
		String contents =
			"This is the initial file contents for *.properties file that should be word-sorted in the Preview page of the multi-page editor";
		return new ByteArrayInputStream(contents.getBytes());
	}

	private void throwCoreException(String message) throws CoreException {
		IStatus status =
			new Status(IStatus.ERROR, "ar.com.miguelgriffa.eclipse.wizards.secureproperties", IStatus.OK, message, null);
		throw new CoreException(status);
	}

	/**
	 * We will accept the selection in the workbench to see if
	 * we can initialize from it.
	 * @see IWorkbenchWizard#init(IWorkbench, IStructuredSelection)
	 */
	public void init(IWorkbench workbench, IStructuredSelection selection) {
		this.selection = selection;
	}
}